The EARLY ASIMOV - Asimov's Foundations: Book 3 by Isaac Asimov & Chris Foss;

Author:Isaac Asimov & Chris Foss;
Language: eng
Format: mobi
Publisher: Panther Books
Published: 1973-01-15T06:00:00+00:00

Averaee 'T'

Purification stage (12 observations) 'T' extremes % error

As isolated

-0.72

-0.25; -1.01

34.1

First recrystallization

-0.95

-0.84; -1.09

9.8

Second recrystallization

-1.05

-0.99; -1.10

4.0

Third recrystallization

-1.11

-1.08; -1.13

1.8

Fourth recrystallization

-1.12

-1.10; -1.13

1.7

First resublimation

-1.12

-1.11; -1.13

0.9

Second resublimation

-1.122

-1.12; -1.13

0.7

It is obvious from Table I that for truly quantitative significance, thiotimoline purified as described must be used. After the second resublimation, for instance, the error involved in an even dozen determinations is less than 0.7%, with the extreme values being —1.119 seconds and —1.126 seconds.

In all experiments described subsequently in this study, thiotimoline so purified has been used.

Time of Solution and Volume of Solvent - As would seem reasonable, experiments have shown that increasing the volume of solvent enables the thiotimoline to dissolve more quickly - i.e., with an increasingly negative time of solution. From Figure 1, however, we can see that this increase in endo-chronic properties levels off rapidly after a volume of solvent of approximately 1.25 ml. This interesting plateau effect has appeared with varying volume of solvent for all varieties of solvents used in these laboratories, just as in all cases the time of solution approaches zero with decreasing volume of solvent.

Time of Solution and Concentration of a Given Ion - In Figure 2, the results are given of the effect of the time of

113

TIME OF SOLUTION (sec.)

Download

Copyright Disclaimer:
This site does not store any files on its server. We only index and link to content provided by other sites. Please contact the content providers to delete copyright contents if any and email us, we'll remove relevant links or contents immediately.